大方廣圓覺修多羅了義經略疏 2.1390

2.1390

亦如《金剛》文勢。然此宗信者，必是即解之信。信該果海，不是小緣，故驗宿因，亦非聊爾人耳。

This is also like the phrasing in the Diamond Sūtra. However, faith in this lineage must be a faith that is identical with understanding. As faith pervades the ocean of the fruit, this is no minor condition; hence, when verifying the past causes, this is likewise no ordinary person.